The DMCA crackdown on Twitch basically nuked the entirety of each streamers' clips/VOD page, resulting in a huge rush of YT channels uploading this content to farm ad revenue. With most streamers operating their own clips/VOD channel, I think there will probably be a skirmish over this old content and where it gets to live. Whether streamers decide to employ DMCA to fight these channels has yet to be seen.
Although it took a few months after Mixer shut down, Twitch has now started upping the number of ads shown to viewers. They've also locked out workarounds to prevent certain ads from showing. The information around this is fuzzy, but my theory is that all Twitch partners have negotiated a deal that the larger X% cut of sub revenue they get, the more pre & mid-roll ads get served to non-subs. I was watching someone play in a tournament and endured roughly 6 to 8 ads over a 15-20 minute period. I missed the final round of one of the games thanks to 3 roughly 30 second ads playing back-to-back. From reading the chat in the channels, it's happening to a lot of people.
If Twitch is still being ran at a loss, then I suspect some kind of major change to the fundamental operation of the platform in the near future to attempt to turn a profit.